Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2020, Vol. 41 ›› Issue (5): 1041-1047.DOI: 10.3969/j.issn.1000-2561.2020.05.026

• Agricultural Product Processing, Preservation, Storage, Analysis and Detection • Previous Articles     Next Articles

Formation of Callus Suberin Tissue of Postharvest Sweet Potato Roots with Abscisic Acid

LYU Xiaolong1,2,3,DENG Yunhong1,WANG Caixia1,*(),SUN Jie2,3,LI Cheng1,CHEN Lin1,SHANG Xiaoqing1,PENG Chunlin1   

  1. 1. College of Food Science, Sichuan Agricultural University, Ya’an, Sichuan 625014, China
    2. Academy of Agricultural Planning and Engineering, Ministry of Agriculture and Rural Affairs, Beijing 100125, China
    3. Key Laboratory of Agro-Products Postharvest Handling, Ministry of Agriculture and Rural Affairs, Beijing 100121,China
  • Received:2019-07-30 Revised:2019-09-07 Online:2020-05-25 Published:2020-06-15
  • Contact: WANG Caixia

Abstract:

In this study, ‘Beijing No.1’ sweet potato was used as the experimental material. After artificially simulating mechanical damage, the sweet potato was treated with different concentrations (25, 50, 100, 200 mg/L) of abscisic acid (ABA). The purpose of this research was to study the callus effect of ABA treatment on postharvest sweet potato roots. ABA treatment could effectively promote the formation of callus in sweet potato wounds, and the best effect was obtained with 100 mg/L ABA for 3 days. ABA treatment could effectively increase the activity of phenylalanine ammonialyase (PAL), peroxidase (POD) and polyphenol oxidase (PPO) in sweet potato callus, increase total phenol and flavonoid content, and reduce sweet potato weight loss. Correlation analysis showed that there was a significant correlation between the content of lignin, total phenol as well as flavonoids of ABA treated sweet potato (P<0.01). The activity of PAL enzyme was significantly correlated with the activity of POD and PPO after ABA treatment (P<0.01). In summary, postharvest ABA treatment can achieve the purpose of promoting the callus formation of sweet potato roots by inducing phenylpropanoid metabolism, improving callus defense enzyme activity and synthesis of secondary metabolites in damaged parts.

Key words: ABA, sweet potato, mechanical damage, callus

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